265385040521 has 8 divisors (see below), whose sum is σ = 265513580640. Its totient is φ = 265256540512.

The previous prime is 265385040511. The next prime is 265385040523. The reversal of 265385040521 is 125040583562.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265385040521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265385040523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28460966 + ... + 28470288.

It is an arithmetic number, because the mean of its divisors is an integer number (33189197580).

Almost surely, 2^265385040521 is an apocalyptic number.

It is an amenable number.

265385040521 is a deficient number, since it is larger than the sum of its proper divisors (128540119).

265385040521 is an equidigital number, since it uses as much as digits as its factorization.

265385040521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20055.

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 265385040521 in words is "two hundred sixty-five billion, three hundred eighty-five million, forty thousand, five hundred twenty-one".